code: def _setupWalkDirectories(self, dir_path):
      # Creating a file structure as follows
      # test_dir -> file: file1.txt; dirs: subdir1_1, subdir1_2, subdir1_3
      # subdir1_1 -> file: file3.txt
      # subdir1_2 -> dir: subdir2
      gfile.makedirs(dir_path)
      gfile.GFile(os.path.join(dir_path, "file1.txt"), mode="w").write(
          "testing"
      )
      sub_dirs1 = ["subdir1_1", "subdir1_2", "subdir1_3"]
      for name in sub_dirs1:
          gfile.makedirs(os.path.join(dir_path, name))
      gfile.GFile(
          os.path.join(dir_path, "subdir1_1/file2.txt"), mode="w"
      ).write("testing")
      gfile.makedirs(os.path.join(dir_path, "subdir1_2/subdir2"))
  
imports: import os.path
  from tensorboard import test
  from tensorboard.compat.tensorflow_stub import compat, errors
  from tensorboard.compat.tensorflow_stub.io import gfile
label_desc: Use image node_id 14 for calling the FileIoTest obj's underlying member method code with example usage: obj._setupWalkDirectories(dir_path) without return types